I really love science, but as a new teacher I am short on ideas for activities and actually teaching science. I want to start structuring my classes so that I give short bursts of information (lectures) for about fifteen minutes, and then have them use that information or do some kind of activity for the next fifteen minutes. Then give them another chunk of information for 15 minutes, and then end with yet another activity. That way they aren't sitting there listening to be blab on for 45 minutes. They can't handle that, and after about 15 minutes is when they start getting crazy and talkative, so i need to keep them on their toes and constantly moving, because when they are busy they are good.Does anybody have any ideas, or ways that you structure you class for middle school?